Camera module for communicating through I2C method

Abstract

The camera module according to the present invention includes a first diode for interrupting overcurrent generated by electrostatic discharge and flowing from an image sensor unit to a serial clock line, a second diode for interrupting the overcurrent generated by the electrostatic discharge and flowing from the image sensor unit to a serial data line, a first switch for cutting off the connection between the image sensor unit and the serial clock line when electric power is not supplied through power line, and a second switch for cutting off the connection between the image sensor unit and the serial data line when the electric power is not supplied through the power line.

1. A camera module for performing communication using I2C. communication method, comprising:
 a lens; 
 an image sensor unit, to which an electric power source voltage is applied through a power line, to convert an image transmitted from the lens into an electric signal, the image sensor unit connected to an I2C bus comprising a serial clock line and a serial data line; 
 a first diode to interrupt overcurrent generated by electrostatic discharge and flowing from the image sensor unit to the serial clock line; 
 a second diode to interrupt the overcurrent generated by the electrostatic discharge and flowing from the image sensor unit to the serial data line; 
 a first switch to cut off the connection between the image sensor unit and the serial clock line when the electric power source voltage is not applied through the power line; and 
 a second switch to cut off the connection between the image sensor unit and the serial data line when the electric power source voltage is not applied through the power line, 
 wherein the power source voltage is supplied to the first and second switches as a control voltage which controls the on/off state of the first and second switches. 
 
     
     
       2. The camera module for performing communication using I2C communication method according to  claim 1 , wherein the image sensor unit comprises a first diode and a second diode. 
     
     
       3. The camera module for performing communication using I2C communication method according to  claim 1 , wherein the first switch and the second switch are bus switches. 
     
     
       4. The camera module for performing communication using I2C communication method according to  claim 1  or  claim 3 , wherein the first switch and the second switch are integrally formed into one body.